The number 1,135,680 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 32 35 39 40 42 48 52 56 60 64 65 70 78 80 84 91 96 104 105 112 120 130 140 156 160 168 169 182 192 195 208 210 224 240 260 273 280 312 320 336 338 364 390 416 420 448 455 480 507 520 546 560 624 672 676 728 780 832 840 845 910 960 1,014 1,040 1,092 1,120 1,183 1,248 1,344 1,352 1,365 1,456 1,560 1,680 1,690 1,820 2,028 2,080 2,184 2,240 2,366 2,496 2,535 2,704 2,730 2,912 3,120 3,360 3,380 3,549 3,640 4,056 4,160 4,368 4,732 5,070 5,408 5,460 5,824 5,915 6,240 6,720 6,760 7,098 7,280 8,112 8,736 9,464 10,140 10,816 10,920 11,830 12,480 13,520 14,196 14,560 16,224 17,472 17,745 18,928 20,280 21,840 23,660 27,040 28,392 29,120 32,448 35,490 37,856 40,560 43,680 47,320 54,080 56,784 70,980 75,712 81,120 87,360 94,640 113,568 141,960 162,240 189,280 227,136 283,920 378,560 567,840 and 1,135,680, with no remainder.
Since 1,135,680 cannot be divided by just 1 and 1,135,680, it is a composite number.